data reduction

set weight equal

average /nocheck offset

plot

modify frequency rest-f

set unit v f

set mode x x1 x2

plot

method gauss

lines 1 "0 0.1 0 30 0 2"

minimize /nocheck baseline

visualize /pen 1

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fitting a line on all pixels

file in filename

set match 5

find /offset 0 0

file out filename2 single

set unit v f

set mode x 10 40

method gauss

for i 1 to found

　　get next

　　modify frequency rest-f

　　lines 1 "0 0.1 0 30 0 2"

　　minimize /nocheck baseline

　　write

next i

生成一个文件filename2，该文件的所有光谱已经经过了fitting

经过基线拟合后的光谱可以生成data cube

file in filename2

find

set weight equal

table filename2 new 

xy_map filename2 /nogrid

以上是将光谱的强度位置宽度写入lmv文件